Correct

设防

/ shèfáng / 
Strokes

Definition

to set up defenses/to fortify

Example

As a Verb

set up defences; fortify; garrison

1
Shèfáng
设防
dìdài
地带

fortified zone

2
Shèfáng
设防
de
的
chéngshì
城市

fortified/embattled city

3
Céngcéng
层层
shèfáng
设防

set up defences in depth